Socket Programming - I
with Python

Manish Patel

04-June-2023

Available ports

netstat -ano #display listening and established connections
netstat -n #list active tcp
netstat -n -o #ports and pid

INSTALL NBTUTOR

pip install nbtutor
jupyter nbextension install --overwrite --py nbtutor
jupyter nbextension enable --py nbtutor

USAGE

%reload_ext nbtutor #CELL MAGIC

%%nbtutor -r -f #PROG MAGIC

WHICH PORT AM I USING?

import socket

# Get the hostname of the current machine
hostname = socket.gethostname()

# Get the IP address associated with the hostname
ip_address = socket.gethostbyname(hostname)

# Create a dummy socket to get the port
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind(('localhost', 0))  # Bind to a random available port
    _, port = s.getsockname()

# Print the IP address and port
print("Hostname:", hostname)
print("IP Address:", ip_address)
print("Port:", port)
Hostname: MANISH-PATEL
IP Address: 192.168.1.2
Port: 61317

ISP DETAILS

import requests

# Make a request to the ip-api.com JSON API
response = requests.get('http://ip-api.com/json')

# Parse the response as JSON
data = response.json()

# Extract ISP information
isp = data.get('isp', 'Unknown')
organization = data.get('org', 'Unknown')
as_number = data.get('as', 'Unknown')
as_name = data.get('asname', 'Unknown')
region = data.get('regionName', 'Unknown')
city = data.get('city', 'Unknown')
country = data.get('country', 'Unknown')
zipcode = data.get('zip', 'Unknown')
latitude = data.get('lat', 'Unknown')
longitude = data.get('lon', 'Unknown')
timezone = data.get('timezone', 'Unknown')

# Print the ISP information
print("ISP:", isp)
print("Organization:", organization)
print("AS Number:", as_number)
print("AS Name:", as_name)
print("Region:", region)
print("City:", city)
print("Country:", country)
print("Zip Code:", zipcode)
print("Latitude:", latitude)
print("Longitude:", longitude)
print("Timezone:", timezone)
ISP: Bharti Airtel
Organization: Bharti Airtel Ltd.
AS Number: AS24560 Bharti Airtel Ltd., Telemedia Services
AS Name: Unknown
Region: Gujarat
City: Ahmedabad
Country: India
Zip Code: 380052
Latitude: 23.0276
Longitude: 72.5871
Timezone: Asia/Kolkata

GET MY IP ADDRESS

import socket

# Create a socket object
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Connect to a remote host and port (example: www.google.com, 80)
s.connect(('www.google.com', 80))

# Get the IP address
ip_address = socket.gethostbyname(socket.gethostname())

print("The IP address being used is:", ip_address)

# Close the socket
s.close()
The IP address being used is: 192.168.22.179

WEBSITE IP ADDRESS USING SOCKET

import socket

def get_ip_address(host):
    # Get IP address using gethostbyname()
    ip = socket.gethostbyname(host)
    return ip

def get_ip_address_advanced(host):
    # Get IP address using getaddrinfo()
    addr_info = socket.getaddrinfo(host, 80)
    ip = addr_info[0][4][0]
    return ip

# Example usage
website = "www.google.com"

# Get IP address using gethostbyname()
ip_address = get_ip_address(website)
print("IP address of", website, "is:", ip_address)

# Get IP address using getaddrinfo()
ip_address_advanced = get_ip_address_advanced(website)
print("Advanced IP address of", website, "is:", ip_address_advanced)
IP address of www.google.com is: 142.250.192.132
Advanced IP address of www.google.com is: 2404:6800:4009:829::2004

INTERNET CONNECTION USING SOCKET

import socket

# Define the remote host and port
host = 'www.google.com'
port = 80

# Create a socket object
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# Connect to the remote host
client_socket.connect((host, port))
print("Connected to {}:{}".format(host, port))

# Send data to the server
request = "GET / HTTP/1.1\r\nHost: {}\r\n\r\n".format(host)
client_socket.sendall(request.encode())

# Receive the server's response
response = client_socket.recv(4096)
print("Received response:\n{}".format(response.decode()))

# Close the connection
client_socket.close()
Connected to www.google.com:80
Received response:
HTTP/1.1 200 OK
Date: Thu, 01 Jun 2023 04:45:59 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=ISO-8859-1
Content-Security-Policy-Report-Only: object-src 'none';base-uri 'self';script-src 'nonce-GvF9aTKeVFvl0pcUsr2XTQ' 'strict-dynamic' 'report-sample' 'unsafe-eval' 'unsafe-inline' https: http:;report-uri https://csp.withgoogle.com/csp/gws/other-hp
P3P: CP="This is not a P3P policy! See g.co/p3phelp for more info."
Server: gws
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN
Set-Cookie: 1P_JAR=2023-06-01-04; expires=Sat, 01-Jul-2023 04:45:59 GMT; path=/; domain=.google.com; Secure
Set-Cookie: AEC=AUEFqZf6ino26IOgt2V97n8pX7vbmjiOQT4ISjQTc7uBe4dAKwjFc54HYlQ; expires=Tue, 28-Nov-2023 04:45:59 GMT; path=/; domain=.google.com; Secure; HttpOnly; SameSite=lax
Set-Cookie: NID=511=fwqIQkKGLFkFn9Wq6Rq3S2hr8lLjbL414IkilJYFKRpHPwhDI-efTBuamcKxbE6aqgKQLnHn7o_tGeLpxcyOsz7FtnAD8mrO03bxHO2VNBT2wxij57_Rg426ObKN1yTmuSl62pw2pEIFHhkE08f1ya2T-I7CJI5FTDs7R_jivQo; expires=Fri, 01-Dec-2023 04:45:59 GMT; path=/; domain=.google.com; HttpOnly
Accept-Ranges: none
Vary: Accept-Encoding
Transfer-Encoding: chunked

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Manish Patel